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prompt
Combined from primary sources listed below.

In Independent routines§

See primary documentation in context for sub prompt. 

multi prompt()
multi prompt($msg)

Prints $msg to $*OUT handle if $msg was provided, then gets a line of input from $*IN handle. By default, this is equivalent to printing $msg to STDOUT, reading a line from STDIN, removing the trailing new line, and returning the resultant string. As of Rakudo 2018.08, prompt will create allomorphs for numeric values, equivalent to calling val prompt.

my $name = prompt "What's your name? ";
say "Hi, $name! Nice to meet you!";
my $age = prompt("Say your age (number)");
my Int $years = $age;
my Str $age-badge = $age;

In the code above, $age will be duck-typed to the allomorph IntStr if it's entered correctly as a number.